'\" te
.\" Copyright (c) 2004, Sun Microsystems, Inc. All Rights Reserved.
.\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License").  You may not use this file except in compliance with the License.
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.TH DI_LINK_NEXT_BY_NODE 3DEVINFO "Jul 12, 2004"
.SH NAME
di_link_next_by_node, di_link_next_by_lnode \- libdevinfo link traversal
functions
.SH SYNOPSIS
.LP
.nf
cc [ \fIflag\fR\&.\|.\|. ] \fIfile\fR\&.\|.\|. \fB-ldevinfo\fR [ \fIlibrary\fR\&.\|.\|. ]
#include <libdevinfo.h>

\fBdi_link_t\fR \fBdi_link_next_by_node\fR(\fBdi_lnode_t\fR \fInode\fR, \fBdi_link_t\fR \fIlink\fR,
     \fBuint_t\fR \fIendpoint\fR);
.fi

.LP
.nf
\fBdi_link_t\fR \fBdi_link_next_by_lnode\fR(\fBdi_node_t\fR \fIlnode\fR, \fBdi_link_t\fR \fIlink\fR,
     \fBuint_t\fR \fIendpoint\fR);
.fi

.SH PARAMETERS
.sp
.ne 2
.na
\fB\fIlink\fR\fR
.ad
.RS 12n
The handle to the current the link or \fBDI_LINK_NIL\fR.
.RE

.sp
.ne 2
.na
\fB\fIendpoint\fR\fR
.ad
.RS 12n
Specify which endpoint of the link the node or lnode should correspond to,
either \fBDI_LINK_TGT\fR or \fBDI_LINK_SRC\fR.
.RE

.sp
.ne 2
.na
\fB\fInode\fR\fR
.ad
.RS 12n
The device node with which the link is associated.
.RE

.sp
.ne 2
.na
\fB\fIlnode\fR\fR
.ad
.RS 12n
The lnode with which the link is associated.
.RE

.SH DESCRIPTION
.sp
.LP
The \fBdi_link_next_by_node()\fR function returns a handle to the next link
that has the same endpoint node as \fIlink\fR.  If \fIlink\fR is
\fBDI_LINK_NIL\fR, a handle is returned to the first link whose endpoint
specified by \fIendpoint\fR matches the node specified by \fInode\fR.
.sp
.LP
The \fBdi_link_next_by_lnode()\fR function returns a handle to the next link
that has the same endpoint lnode as \fIlink\fR.  If \fIlink\fR is
\fBDI_LINK_NIL\fR, a handle  is returned to the first link whose endpoint
specified by \fIendpoint\fR matches the lnode specified by \fIlnode\fR.
.SH RETURN VALUES
.sp
.LP
Upon successful completion, a handle to the next link is  returned.  Otherwise,
\fBDI_LINK_NIL\fR is returned and \fBerrno\fR is set to indicate the error.
.SH ERRORS
.sp
.LP
The \fBdi_link_next_by_node()\fR and \fBdi_link_next_by_lnode()\fR functions
will fail if:
.sp
.ne 2
.na
\fB\fBEINVAL\fR\fR
.ad
.RS 10n
An argument is invalid.
.RE

.sp
.ne 2
.na
\fB\fBENXIO\fR\fR
.ad
.RS 10n
The end of the link list has been reached.
.RE

.sp
.LP
The \fBdi_link_next_by_node()\fR function will fail if:
.sp
.ne 2
.na
\fB\fBENOTSUP\fR\fR
.ad
.RS 11n
Device usage information is not available in snapshot.
.RE

.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(7) for descriptions of the following attributes:
.sp

.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE
_
Interface Stability	Evolving
_
MT-Level	Safe
.TE

.SH SEE ALSO
.sp
.LP
.BR di_init (3DEVINFO),
.BR libdevinfo (3LIB),
.BR attributes (7)
